Composite concrete column and construction method using the same

ABSTRACT

A composite concrete column comprising: upper and lower concrete column portions extending in the lengthwise direction and having an exposed portion between the upper and lower concrete column portions; an H-beam connected between the upper and lower concrete column portions to be exposed at the exposed portion; and a plurality of reinforcement bars embedded in the upper and lower concrete column portions around the H-beam to extend in the lengthwise direction.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of PCT International PatentApplication No. PCT/KR2008/002381, filed Apr. 25, 2008, and KoreanPatent Application No. 2007-40724, filed Apr. 26, 2007, in the KoreanIntellectual Property Office, the disclosures of which are incorporatedherein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a composite concrete column and aconstruction method using the same, more particularly to a compositeconcrete column and a construction method using the same by whichinstallation and construction is convenient and stability andreliability is improved while shortening the period of construction.

2. Description of the Related Art

A building structure so called ‘a Rahmen structure’ consists of acrossbeam, a column and a slab. In constructing such a buildingstructure, a slab is formed on the column and crossbeam, and cast inconcrete. Since the procedure of installing the columns and the beamsand concreting is conducted in place, it takes time and labor.

A PC (pre-cast concrete) is widely used to decrease the period ofconstruction and labor, in which a structure of reinforcing bars andconcrete is constructed in the factory and transferred to be installedin the construction place. Accordingly the PC structure has an advantageof shortening the period of construction. However, the PC structure isso heavy and bulky to handle in the construction place.

SUMMARY OF THE INVENTION

The present invention is designed to solve the above problems of theprior art. It is an object of the invention to provide a compositeconcrete column having advantages of shortening the period ofconstruction and reducing the size and weight of a structure whileproviding enhanced resistance to earthquake in the case of tallbuildings compared to the conventional PC structure.

A composite concrete column of the present invention may be installedconveniently and quickly, and it is preferable to be used together witha composite concrete crossbeam invented by the inventor.

Another object of the present invention is to provide a constructionmethod using the composite concrete column.

In order to accomplish the above object, the present invention providesa composite concrete column comprising: upper and lower concrete columnportions extending in the lengthwise direction and having an exposedportion between the upper and lower concrete column portions; an H-beamconnected between the upper and lower concrete column portions to beexposed at the exposed portion; and a plurality of reinforcement barsembedded in the upper and lower concrete column portions around theH-beam to extend in the lengthwise direction.

According to another aspect of the present invention, there is provideda composite concrete column comprising: an H-beam having a pair offlanges in parallel and a web connecting the pair of flanges each other;a pair of upper and lower concrete column portions formed on the sidesurfaces of the H-beam having an exposed portion between the upper andlower concrete column portions to face each other; and a plurality ofreinforcement bars embedded in the upper and lower concrete columnportions around the H-beam to extend in the lengthwise direction.

Preferably, a plurality of brackets is formed on the side surface of theH-beam at the exposed portion.

More preferably, a support portion is laterally extended from the uppersurface of the concrete column portion.

Preferably, both ends of the H-beam are embedded in the concrete columnportions.

More preferably, a plurality of studs is provided on the side surface ofthe H-beam at the portion embedded in the concrete column portions.

According to another embodiment, the present invention further comprisesembedded plates embedded in the lower end of the upper concrete columnportion and the upper end of the lower concrete column portion with itsone sides exposed, and wherein both ends of the H-beam are connected tothe one sides of the embedded plates.

According to another still embodiment, the H-beam is embedded in theconcrete column portions through the whole length of the concrete columnportions.

Preferably, a cavity is formed in the concrete column portions.

According to another aspect of the present invention, there is provideda construction method comprising the following steps of: installingcomposite concrete columns including upper and lower concrete columnportions extending in the lengthwise direction with having an exposedportion between the upper and lower concrete column portions, an H-beamconnected between the upper and lower concrete column portions to beexposed at the exposed portion, and a plurality of reinforcement barsembedded in the upper and lower concrete column portions around theH-beam to extend in the lengthwise direction; connecting ends ofcrossbeams to the H-beam at the exposed portion of the compositeconcrete columns; installing molds on the composite concrete columns andthe crossbeams; and putting concrete on the molds and curing the same.

According to another aspect of the present invention, there is provideda construction method comprising the following steps of: installingcomposite concrete columns including an H-beam having a pair of flangesin parallel and a web connecting the pair of flanges each other, a pairof upper and lower concrete column portions formed on the side surfacesof the H-beam having an exposed portion between the upper and lowerconcrete column portions to face each other, and a plurality ofreinforcement bars embedded in the upper and lower concrete columnportions around the H-beam to extend in the lengthwise direction;connecting ends of crossbeams to the H-beam at the exposed portion ofthe composite concrete columns; installing molds on the compositeconcrete columns and the crossbeams; and putting concrete on the moldsand curing the same.

Preferably, the crossbeam is a composite concrete crossbeam comprising:an H-beam; stirrup bars installed at a predetermined interval along theH-beam; and concrete member embedding at least a portion of the H-beam,and wherein a front end of the concrete member of the composite concretecrossbeam rest on the support portion.

Preferably, a crossbeam installed on the outer portion of a wallcomprises a support provided on the edge of the upper surface of theconcrete member, and wherein an outer slab mold having a section ofL-shape is installed on the support.

More preferably, a crossbeam installed on the outer portion of a wallcomprises a support provided on the edge of the upper surface of theconcrete member, and a reinforcement angle bar connected between theupper surface and the side surface of the support, and wherein an outerslab mold having a section of L-shape is installed on the support.

According to the present invention, since buildings are constructed byinstalling pre-cast composite concrete columns and connecting crossbeamsto the composite concrete columns, the construction procedure issimplified and the period of construction is reduced.

Particularly, the composite concrete column would be advantageous if itis used together with the composite concrete crossbeams suggested by theinventor.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the invention will becomeapparent and more readily appreciated from the following description ofthe embodiments, taken in conjunction with the accompanying drawings ofwhich:

FIG. 1 is an exploded perspective view schematically showing a compositeconcrete column according to a first preferred embodiment of the presentinvention;

FIG. 2 is a front sectional view schematically showing a compositeconcrete column according to the first preferred embodiment of thepresent invention;

FIG. 3 is a side sectional view schematically showing a compositeconcrete column according to the first preferred embodiment of thepresent invention;

FIG. 4 is a side sectional view schematically showing a compositeconcrete column according to a second preferred embodiment of thepresent invention;

FIG. 5 is a side sectional view schematically showing a compositeconcrete column according to a third preferred embodiment of the presentinvention;

FIG. 6 is an exploded perspective view schematically showing a compositeconcrete column in FIG. 5;

FIG. 7 is an exploded perspective view schematically showing a compositeconcrete column according to a fourth preferred embodiment of thepresent invention;

FIG. 8 is a side sectional view schematically showing a compositeconcrete column according to a fourth preferred embodiment of thepresent invention;

FIG. 9 is a planar sectional view schematically showing a compositeconcrete column in FIG. 8.

FIG. 10 is an exploded perspective view schematically showing acomposite concrete column according to a fifth preferred embodiment ofthe present invention;

FIG. 11 is a planar sectional view schematically showing a compositeconcrete column in FIG. 10.

FIG. 12 is a side sectional view schematically showing a constructionstate using the composite concrete column according to the preferredembodiment of the present invention;

FIG. 13 is a planar sectional view schematically showing a constructionstate using the composite concrete column according to the preferredembodiment of the present invention;

FIG. 14 is a perspective view schematically showing a composite concretecrossbeam connected to the composite concrete column according to thepreferred embodiment of the present invention;

FIG. 15 is a plan view schematically showing a composite concretecrossbeam connected to the composite concrete column according to thepreferred embodiment of the present invention;

FIG. 16 is a planar sectional view schematically showing a constructionstate in which the composite concrete crossbeams are connected to thecomposite concrete column according to the preferred embodiment of thepresent invention;

FIG. 17 is a perspective view schematically showing a composite concretecrossbeam for connecting another composite concrete crossbeam accordingto the preferred embodiment of the present invention;

FIG. 18 is a sectional view schematically showing a construction statein which the composite concrete crossbeams are connected with a traversereinforcement member according to the preferred embodiment of thepresent invention;

FIG. 19 is a sectional view schematically showing a construction stateof outer area according to the preferred embodiment of the presentinvention; and

FIG. 20 is a sectional view schematically showing a construction stateof outer area according to anther preferred embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIGS. 1 through 3 show a composite concrete column according to apreferred embodiment of the present invention. Here, FIG. 1 is aperspective view of a composite concrete column, FIG. 2 is a frontsectional view of a composite concrete column, and FIG. 3 is a sidesectional view of a composite concrete column.

Referring to the drawings, a composite concrete column of the presentinvention comprises concrete column portions 10 and 20 extendinglengthwise, an H-beam 30 connected between ends of the concrete columnportions 10 and 20 to be exposed, and a plurality of reinforcement bars40 embedded in the concrete column portions 10 and 20 around the H-beam30 to extend lengthwise.

The concrete column portions comprise an upper concrete column portion10 and a lower concrete column portion 20 so that an exposed portion 15where the H-beam 30 and the reinforcement bars 40 are exposed is formedbetween the lower end of the upper concrete column portion 10 and theupper end of the lower concrete column portion 20. As described later,ends of crossbeams are connected to the exposed portion 15 so that theexposed portion 15 is located as high as a slab is formed.

The exposed portion 15 has a plurality of brackets 51, 52, 53 and 54 toconnect the crossbeam. For example, the brackets 51, 52, 53 and 54 maybe T-shaped steel member having fastening holes 55 that is welded to theside surface of the H-beam 30. The H-beam 30 includes a pair of flanges31 and 32 in parallel, and a web 33 connecting the pair of flanges 31and 32 so that the brackets 51 and 53 are welded to the outer surfacesof the flanges 31 and 32, and the brackets 52 and 54 are welded to bothsides of the web 33 of the H-beam 30. However, the brackets are notlimited to the present embodiment, and may be modified so as to connectends of crossbeam by means of fasteners.

The concrete column portions 10 and 20 are body of the column, andpreferably have a section of square or circle, etc. More preferably,upper ends of the concrete column portion 10 and 20 have a supportportion 22 laterally extending to stably support the end of thecrossbeam. Accordingly, the end of the crossbeam is rest on the supportportion 22 to be stably supported. However, the present embodiment doesnot restrict the configuration of the concrete column portion. In analternative embodiment, the concrete column portion (see 20′ of FIG. 4)may not have the support portion.

According to the present embodiment, the H-beam 30 is connected with theconcrete column portions 10 and 20 so that the ends of the H-beam 30 areembedded in the concrete column portions 10 and 20. That is, an upperend 30 a of the H-beam is embedded in the lower end of the upperconcrete column portion 10, and lower end 30 b of the H-beam is embeddedin the upper end of the lower concrete column portion 20. Morepreferably, a plurality of studs 34 are formed on the side surface ofthe H-beam 30 that is embedded in the concrete column portion, whichresults in firm connection with the concrete column portion.

The reinforcement bars 40 are installed around the H-beam 30 to extendalong the length of the concrete column portions 10 and 20 so that mostof the length of the reinforcement bars 40 is embedded in the concretecolumn portions 10 and 20 while only a part of them is exposed at theexposed portion 15. The reinforcement bars may include modifications aslong as it is able to reinforce the composite concrete column of thepresent invention.

Although the present embodiment illustrates the composite concretecolumn having two concrete column portions, the number of the concretecolumn portion is not limited to this, and the composite concrete columnof the present invention may comprise three concrete column portions.

FIGS. 5 and 6 show a composite concrete column according to a thirdembodiment of the present invention. Here, the same numeral referencesas the previous embodiment denote the same members.

Referring to the drawings, a composite concrete column of the presentembodiment comprises concrete column portions 10 and 20 extendinglengthwise, embedded plates 60 which are embedded in the ends of theconcrete column portions 10 and 20 so that one sides of the embeddedplates 60 are exposed, an H-beam 301 connected to the embedded plates60, and a plurality of reinforcement bars 40 embedded in the concretecolumn portions 10 and 20 around the H-beam 30 a to extend lengthwise.

In the present embodiment, embedded plates 60 made of steel areinstalled at the lower end of the upper concrete column portion 10 andthe upper end of the lower concrete column portion 20, respectively. Theembedded plates 60 are embedded in the concrete column portions 10 and20 of which one sides are exposed. Also, the embedded plates 60 have aplurality of studs 62 at the other ends to be fixed in the concretecolumn portions 10 and 20.

The end of H-beam 301 is welded to the exposed surface of the embeddedplate 60 as shown in FIG. 6. According to the present embodiment, theH-beam 301 has the same height as the exposed portion 15. Also, like theprevious embodiment, a plurality of brackets 51, 52, 53 and 54 isconnected to the side surface of the H-beam 301.

In the composite concrete column of the present embodiment, the concretecolumn portions 10 and 20 and the H-beam 301 may be welded in thefactory in advance, and alternatively, they may be assembled by weldingin place. In the latter case, the composite concrete column can bedownsized to facilitate transportation.

FIGS. 7 to 9 show a composite concrete column according to a fourthembodiment of the present invention. FIG. 7 is a perspective view of acomposite concrete column, FIG. 8 is a side sectional view of acomposite concrete column, and FIG. 9 is a planar sectional view of acomposite concrete column. Here, the same numeral references as theprevious embodiment denote the same members.

Referring to the drawings, a composite concrete column of the presentembodiment comprises concrete column portions 10 and 20 extendinglengthwise, an H-beam 302 embedded in the concrete column portions 10and 20 in the whole length of the concrete column portions 10 and 20while exposed between the concrete column portions 10 and 20, and aplurality of reinforcement bars 40 embedded in the concrete columnportions 10 and 20 around the H-beam 302 to extend lengthwise.

In the present embodiment, most of the length of the H-beam 302 isembedded in the concrete column portions 10 and 20, while only a part ofthe H-beam 302 is exposed at an exposed portion 15 between the concretecolumn portions 10 and 20.

Preferably, the concrete column portions 10 and 20 have a cavity 70 asshown in FIG. 9. More preferably, the cavity 70 is formed betweenflanges 302 a and 302 b of the H-beam along the length of the H-beam.However, the cavity may be formed at any place in the concrete columnportions 10 and 20 to have various shapes.

The cavity 70 makes the composite concrete column light so as to easedealing and transferring them. Also, with the cavity 70, the concretecolumn portions 10 and 20 functions as a mold when concreting.

FIGS. 10 and 11 show a composite concrete column according to a fifthembodiment of the present invention. FIG. 10 is a perspective view of acomposite concrete column, and FIG. 11 is a planar sectional view of acomposite concrete column.

As shown in the drawings, a composite concrete column of the presentembodiment comprises an H-beam 303, concrete column portions 100 and 200attached to both side surfaces of the H-beam 303 extending lengthwise,and a plurality of reinforcement bars 40 embedded in the concrete columnportions 100 and 200 around the H-beam 303 to extend lengthwise.

The concrete column portions comprise a pair of upper concrete columnportions 101 and 102 formed on the side surfaces of the flanges 303 aand 303 b of the H-beam 303 to face each other, and a pair of lowerconcrete column portions 201 and 202. A plurality of studs 305 areformed on the side surfaces of the flanges 303 a and 303 b of the H-beam303 that is embedded in the concrete column portion, which results infirm connection with the concrete column portion.

The present embodiment makes the composite concrete column light so asto ease dealing and transferring them like the previous embodiment.Also, molds 310 and 311 should be installed to cover the cavity betweenthe concrete column portions 100 and 200 as shown in FIG. 11.

Now the construction method using the above composite concrete columnwill be described. FIGS. 12 and 13 illustrate the construction ofbuilding structure using the composite concrete column. For convenienceof explanation, the present embodiment is directed to the compositeconcrete column of FIGS. 1 to 3, but other composite concrete columnsmay be adopted in the same way.

FIG. 12 shows a composite concrete column of the present inventioninstalled on the ground G in the construction place. The compositeconcrete column is manufactured in the factory in advance, and thenfixed to the ground at the lower end of the concrete column portion 20.

Subsequently, crossbeams 400 are connected to the exposed portion 15 ofthe composite concrete column at the end thereof. In the presentinvention, the crossbeam denotes an H-beam or a structure having anH-beam. More preferably, the crossbeam comprises the composite concretecrossbeam of FIGS. 14 and 15.

Referring to FIGS. 14 and 15, the composite concrete crossbeam comprisesan H-beam 410, stirrup bars 420 installed at a predetermined intervalalong the H-beam 410, and concrete member 430 embedding at least aportion of the H-beam 410. The H-beam 410 includes an upper flange 411and a lower flange 412 in parallel each other, and a web 413 connectingthe upper and lower flanges 411 and 412.

Preferably, the lower flange 412 of the H-beam 410 has studs embedded inthe concrete member 430 so that the H-beam 410 is able to firmly connectwith the concrete member 430.

The stirrup bars 420 are arranged at a predetermined interval along thelength of the H-beam 410, preferably, the stirrup bar 420 comprises ahorizontal bar portion 421 embedded in the concrete member 430 totraverse the lower surface of the lower flange 412 of the H-beam 410, aintermediate bar portion 422 extending upward from the both ends of thehorizontal bar portion 421 with an upper end of the intermediate barportion 422 exposed out of the concrete member, and a extended barportion 423 laterally extending outward from the upper end of theintermediate bar portion 422.

The stirrup bars 420 make a compression force along the H-beam 410 toapply evenly through the section of the H-beam, and resist to a shearforce applied in the direction rectangular to the H-beam. It should beunderstood that various kinds of stirrup bars may be adopted, notlimited to the embodiment.

The concrete member 430 is formed integrally on the H-beam 410lengthwise to embed at least a portion of the length of the H-beam.Preferably, the concrete member 430 embeds at least a part of the lowerflange 412.

The concrete member 430 effectively resists to a bending force and acompression force together with the H-beam 410. Also, the concretemember 430 increases in the sectional area of the composite concretecolumn to thereby strengthen the resistance to external forces.

As shown in the drawing, both ends of the H-beam 410 are exposed out ofthe concrete member 430 so that the composite concrete crossbeam can beconnected to the composite concrete column of the present invention. Todo so, fastening holes 410 a may be formed at the ends of the H-beam410.

Preferably, the composite concrete crossbeam 400 comprisesextension/compression bars which resist to an extension force and acompression force applied to the composite concrete crossbeam.Preferably, the extension/compression bars comprise a plurality ofembedded bars 440 embedded between the lower flange 412 of the H-beam410 and the horizontal bar portions 421 of the stirrup bars 420 in theconcrete member in the lengthwise direction, and exposed bars 450 whichare not embedded in the concrete member 430. Additionally, another typedbar other than the embedded bars 440 and the exposed bars 450 may beadopted.

More preferably, reinforcement members 460 are further provided tosupport the stirrup bars 420 and the concrete member 430. Thereinforcement member 460 is a reinforcement bar or a bar-typed member ofwhich one end is welded to the upper flange 411 of the H-beam 410 andthe other end is connected to the exposed portion of the stirrup bars420.

FIGS. 12 and 13 illustrate the state in which composite concretecrossbeams 400 having the above mentioned configuration are connected tothe composite concrete columns of the present invention. Specifically,the end of the H-beam 410 of the composite concrete crossbeam 400 isconnected to the H-beam 30 at the exposed portion of the compositeconcrete column. Preferably, the brackets 51 and 53 provided on theH-beam 30 of the composite concrete column are connected with the end ofthe H-beam 410 of the composite concrete crossbeam 400 by means of aconnection plate 56 while fasteners such as bolts are inserted into thefastening holes 55 and 410 a and fixed. FIG. 13 shows the H-beams 410that are connected with the brackets 51, 52, 53 and 54 of the compositeconcrete column by bolts.

More preferably, a front end 430 a of the concrete member 430 of thecomposite concrete crossbeam 400 rests on the upper surface, i.e., onthe support portion 22 of the lower concrete column portion 20 of thecomposite concrete column. With such a structure, it is very easy toconnect the composite concrete crossbeam to the composite concretecolumn, and stability of structure may be assured.

FIG. 16 shows four composite concrete columns 10 a, 10 b, 10 c and 10 don which composite concrete crossbeams 400 a, 400 b, 400 c and 400 d areconnected. Another composite concrete crossbeam 400 e is furtherconnected between the two composite concrete crossbeams 400 a and 400 c.Here, the composite concrete crossbeams 400 a and 400 c have connectionbrackets 470 formed with fastening holes 470 a at the connection pointas shown in FIG. 17. Accordingly, the end of the H-beam of the compositeconcrete crossbeam 400 e can be connected to the connection bracket 470in the same manner as the above.

Referring again to FIG. 16, the composite concrete crossbeams 400 b, 400d and 400 e may be fastened each other by a traverse reinforcementmember 500 to prevent deformation or distortion of the compositeconcrete crossbeams when concreting. The traverse reinforcement member500 is like an H-beam, preferably, which is welded to the upper flange411 of the H-beam 410 of the composite concrete crossbeam 400 e as shownin FIG. 18.

As mentioned above, when the composite concrete columns and thecomposite concrete crossbeams are installed, molds are installed. A moldsuch as a deck plate may be installed between the composite concretecrossbeams 400 a through 400 e for a slab. Installation and constructionof the deck plate mat be conducted according to Korean patentapplication No. 10-2005-0104999.

A mold 520 may be installed at the connection point of the compositeconcrete column and the composite concrete crossbeam. At the same time,reinforcement bars are additionally arranged for the slab.

FIG. 19 illustrates a composite concrete crossbeam 400′ at the outerportion of a wall. The composite concrete crossbeam 400′ of the presentembodiment may comprises the same elements as the previous embodiment,and a support 481 having a section of L-shape is provided on the edge ofthe upper surface of the concrete member 430. Preferably, the support481 is fixed by an embedded bolt 482 in the concrete member 430. Also,an outer slab mold 483 having a section of L-shape is installed on theupper surface of the support 481. The outer slab mold 483 may be engagedwith the support 481 by welding or bolts.

FIG. 20 illustrates another embodiment of the present invention showingan outer portion of a wall. The composite concrete crossbeam 400″ has asupport 491 of L-shape at one side. The support 491 has a length of theupper surface and the side surface larger than the support 481 of FIG.19, and it may be fixed to the concrete member 430 by a plurality ofembedded bolts 492 and 493 at the side surface.

More preferably, a reinforcement angle bar 494 is connected between theupper surface and the side surface of the support 491 to cover the loadon the upper surface of the support 491. Like the previous embodiment,the outer slab mold 495 of L-shape is installed on the upper surface ofthe support 491.

When the installation of the composite concrete columns and thecomposite concrete crossbeams with molds are completed, concrete is puton the structure and cured.

Additionally, when constructing upper storey, another composite concretecolumn is connected on the composite concrete column. Here, thecomposite concrete columns can be connected by welding ends of theH-beams 30. That is, since the additional composite concrete column hasan H-beam or an embedded plate exposed at the lower end thereof, theH-beam or the embedded plate is welded to the upper end of the lowercomposite concrete column. At this time, the reinforcement bars may belinked with another bar by a mechanical splice.

1. A composite concrete column comprising: upper and lower concretecolumn portions extending in the lengthwise direction and having anexposed portion between the upper and lower concrete column portions; anH-beam connected between the upper and lower concrete column portions tobe exposed at the exposed portion; and a plurality of reinforcement barsembedded in the upper and lower concrete column portions around theH-beam to extend in the lengthwise direction.
 2. A composite concretecolumn comprising: an H-beam having a pair of flanges in parallel and aweb connecting the pair of flanges each other; a pair of upper and lowerconcrete column portions formed on the side surfaces of the H-beamhaving an exposed portion between the upper and lower concrete columnportions to face each other; and a plurality of reinforcement barsembedded in the upper and lower concrete column portions around theH-beam to extend in the lengthwise direction.
 3. The composite concretecolumn according to claim 1, wherein a plurality of brackets is formedon the side surface of the H-beam at the exposed portion.
 4. Thecomposite concrete column according to claim 3, wherein a supportportion is laterally extended from the upper surface of the concretecolumn portion.
 5. The composite concrete column according to claim 1,wherein both ends of the H-beam are embedded in the concrete columnportions.
 6. The composite concrete column according to claim 5, whereina plurality of studs is provided on the side surface of the H-beam atthe portion embedded in the concrete column portions.
 7. The compositeconcrete column according to claim 1, further comprising embedded platesembedded in the lower end of the upper concrete column portion and theupper end of the lower concrete column portion with its one sidesexposed, and wherein both ends of the H-beam are connected to the onesides of the embedded plates.
 8. The composite concrete column accordingto claim 1, wherein the H-beam is embedded in the concrete columnportions through the whole length of the concrete column portions. 9.The composite concrete column according to claim 1, wherein a cavity isformed in the concrete column portions.
 10. A construction methodcomprising the following steps of: installing composite concrete columnsincluding upper and lower concrete column portions extending in thelengthwise direction with having an exposed portion between the upperand lower concrete column portions, an H-beam connected between theupper and lower concrete column portions to be exposed at the exposedportion, and a plurality of reinforcement bars embedded in the upper andlower concrete column portions around the H-beam to extend in thelengthwise direction; connecting ends of crossbeams to the H-beam at theexposed portion of the composite concrete columns; installing molds onthe composite concrete columns and the crossbeams; and putting concreteon the molds and curing the same.
 11. A construction method comprisingthe following steps of: installing composite concrete columns includingan H-beam having a pair of flanges in parallel and a web connecting thepair of flanges each other, a pair of upper and lower concrete columnportions formed on the side surfaces of the H-beam having an exposedportion between the upper and lower concrete column portions to faceeach other, and a plurality of reinforcement bars embedded in the upperand lower concrete column portions around the H-beam to extend in thelengthwise direction; connecting ends of crossbeams to the H-beam at theexposed portion of the composite concrete columns; installing molds onthe composite concrete columns and the crossbeams; and putting concreteon the molds and curing the same.
 12. The construction method accordingto claim 10, wherein a plurality of brackets is formed on the sidesurface of the H-beam at the exposed portion, and wherein the ends ofthe crossbeams are connected with the brackets.
 13. The constructionmethod according to claim 12, wherein a support portion is laterallyextended from the upper surface of the concrete column portion, andwherein the ends of crossbeams rest on the support portion.
 14. Theconstruction method according to claim 13, wherein the crossbeam is acomposite concrete crossbeam comprising: an H-beam; stirrup barsinstalled at a predetermined interval along the H-beam; and concretemember embedding at least a portion of the H-beam, and wherein a frontend of the concrete member of the composite concrete crossbeam rest onthe support portion.
 15. The construction method according to claim 14,wherein a crossbeam installed on the outer portion of a wall comprises asupport provided on the edge of the upper surface of the concretemember, and wherein an outer slab mold having a section of L-shape isinstalled on the support.
 16. The construction method according to claim14, wherein a crossbeam installed on the outer portion of a wallcomprises a support provided on the edge of the upper surface of theconcrete member, and a reinforcement angle bar connected between theupper surface and the side surface of the support, and wherein an outerslab mold having a section of L-shape is installed on the support. 17.The construction method according to claim 10, wherein both ends of theH-beam are embedded in the concrete column portions.
 18. Theconstruction method according to claim 17, wherein a plurality of studsis provided on the side surface of the H-beam at the portion embedded inthe concrete column portions.
 19. The construction method according toclaim 10, embedded plates embedded in the lower end of the upperconcrete column portion and the upper end of the lower concrete columnportion with its one sides exposed are provided, and wherein both endsof the H-beam are connected to the one sides of the embedded plates. 20.The construction method according to claim 10, wherein the H-beam isembedded in the concrete column portions through the whole length of theconcrete column portions.
 21. The construction method according to claim20, wherein a cavity is formed in the concrete column portions.
 22. Theconstruction method according to claim 10, wherein the crossbeamsconnected with the composite concrete columns are fastened each other bya traverse reinforcement member.